Gauge



July 11, 1933. F. w. DWYER 1,917,637

GAUGE Filed Feb. 24, 193].-

Patented July 11, 1933 ram w. nwrnn, or our raax nmmors canon Application fled loin-nary, 1881. Serial No. 517,850.

uated scale so arranged that the readings onthe scale may be readily made.

Another object of the invention is the provision of a gauge that is inexpensive to manuiacture, simple in construction, accurate in operation, and that is not likely to become broken or get out of order.

Qther and further objects and advantages of the invention will appear from the follow ing description taken in connection with the accompanying drawing, in which I Fig. l-is a side elevation of the instrument,

with parts in section and parts broken away; Fig.% is a section on line 2-2 of Fig. P Fig. 3 is a similar section of a portion oi m the gauge with the stopper in position therein;

Fig. i is a side elevation of a modified form of construction; I

Fig. 5 is a view at shown in Fig. 4; and

Fig. 6 is a transverse section of a modified construction of the form shown in Fig. 1.

1n the construction of gauges for measuring as pressures it is common practice to m provide a container right angles to that for the indicating liquid that is separate from the body of the gauge. 1t is usually of glass with a fine bore. such devices it is necessary to calibrate each dually because of inequaliinstrument indivi ties in the diameters of the bores. This ense. Furthermore,

entails considerable ex since the tube is expose I it is not infrequently broken, thus incurring considerable expense in repairing the instrument.

The present invention seeks to eliminate this difliculty by making the body of the gauge of transparent material and boring the assages for containing the indicating liquid.

y boring the passages accuracy is insured and the gauges may be manufactured on a production basis, t ereby greatly reducing the cost of manufacture as well as standardizin the instruments.

eferring now to Figs. 1 to,3 of the draw- 1 ing, in WhlCh is disclosed; one embodiment of the invention, which is by way of example only, the reference character 10 designates generally the gauge which comprises the block or body member 11 vof transparent material. Any suitable transparent material may be used, such for instance as celluloid, or plastic condensation products such as bakelite, phthalic Eanhydride, ureaic condensate and the like. \This body member may be of any suitable form or shape, that shown bein rectangular in cross-section. The body mem er is provided with a. longitudinally extending bore 13 which is adapted to be in an inclined position when the device is in use, whereb the readings can be taken from the liqui in this passage.

The body) member is also provided with transverse ores 14 and 15 which, when in use, extend vertically from the ends of bore 13 and are in communication therewith. The bores 13, 14 and 15 constitute what may be termed a U- haped passage for containing the -'ndicating liquid 16. The bore 15 of the U-passage is preferably considerably enlarged and forms'a reservoir for the liquid 16'.

In the formation of the device, the bore or passage 13 may be drilled from one end of the member 11 at an acute angle to the bore 15, whereby when in use the end of the liguid column will be within the passage his passage inclines upwardly toward what for convenience will be termed the outer end of the body member, and in order to conserve material the lower portion of the outer end of the body member ma be cut away to form an inclinedbottom we 1 12. The assa e 13 is adapted to be closed by a suita le p ug or stopper 17. The bores 14 and 15 are drilled from thetop of the -1 M, a, 1 cody member ll. tiny suitsbie mecnani body member 11; the bore 14 is counterbored as at 18 for receiving a plug 19 which is interchangeable with the plug 21 inserted in the outer end of the bore 15. The plugs 17, 19 and 21 may be of any suitable material, such as rubber, cork or the like.

The plug 19 is rovided with an opening 22 in which is a apted to be mounted an air vent member 23. The member 23 is provided with a small air passage extending longitudinally thereof for constituting a Vent for the bore 14:. The plug 21 is provided with an 0 ening 24: extending longitudinally thereor and is adapted to receive one end or" a hose connector 25. The opposite end 26 of the connector is adapted to be attached to the usual metal tube insertaole in the draft space.

The body portion 11 is provided with a scale to indicate the pressure. Any suitable arrangement may be used for this purpose. In the construction shown, which is by way of example only, e. separate scale member 2? provided with a scale thereon is employed.

unis member is preferably, though not necessarily, adjustable on the gauge. in the position shown in 1 this member is preferably mounted on farther side so that the graduations 28 may read through the '1 .13 v.I .-L m revises ior slidably mountin this so 13 1 side Oi the body member cale men'iber is provided Wit F'-1-.. m ens. 0; iGnDeCsl. 0Q A )0 ..o O extend. he bod provide-cl with a spirit level in t ng the horizontal position of the uper sursce of the instrument. A lVSlZIW o is provided for we e. H

supporting tor conenie..ce will be termed the outer end or end opposite the reservoir 5, for prop= erlv leveling the instrument.

in the use 01" the device the instrument properly leveled and the scale member 27 adjusted so that the zero graduation mark 36 will be opposite the outer end 37 of the liquid column in the passage 13. The metal tube is then placed in the draft or space in which the pressure is to be tested, and if this space is at sub-atmospheric pressure the end 37 of the liquid column will move to the right in Fig. 1 and its position will be indicated by the scale at the right of the zero point 36.

If the space is at super-atmospheric pressure the liquid column will move to the left, and its readin will be indicated on the scale at the left of t e zero point 36.

When the instrument is not in use, the members 23 and 25 may be withdrawn and suitable stoppers 38 may be inserted in the plugs 19 and 21 as indicated in Fig. 3 of the ated scale member drawing for preventing the escape of the li ui he form of construction shown in Figs. 4 and-5 difiers from that shown in Figs. 1 and 2 in that the body ofthe instrument 41 is supported on its end during use. In this form of construction the body 4:1 is of transparent material as in the former construction, and a il-shaped passage 42 is provided in the block. The two legs l3 and A l of this passage extend vertically and are open at their'upper ends. The connecting passage 45 extends substantially horizontaly across the lower portion of the body member l1 and is made by drilling from the side, the opening being closed by a suitable plug or stopper 46. The scale 4;? is adgustably mount ed on the body portion as in t e previous con struction and the readings are substantially the same. "in this case the resdin are .L AL, J. .L'! 1' ,I] q 4. when iloin the here; {1 or the liquid in the leg 43.

Fig. 6 is shown a modified of construction in which the block or body member l? of transparent materiel, differs from the corresponding bod member d2 to which is e cale 2'3 posed rney beco ency, for some the seal re f, be read from a point above tie instru- While the scale 27, see Fig. 1, is graduated in both directions from the zero point 36 it is evident that the zero point could be located at the outer end of the scale, and when it is desired to measure super-atmospheric pressures the tube connector 25 is ottached to the plug 19. The readings then will be indicated on the scale in the same Inenner as when the pressures are sub-atmospheric with the connector 25 in position in the plug 21 as shown inFig. 1.

1 claim as my invention:

1. A gauge comprising a block of parent material in, the legs of and a diameter greater than the connecting port1on of said U, the ends of said bore being of substantially the same diameter, interchangeable plugs for said bore, and a graduadjustably transsaid U extending upwardly said block.

having a U-shape bore there-v being of unequal diameter, and each of 4 mounted on names? Q. A gauge comprising a biwh or trans parent material having a ll-shape here therein, for containing a liquid, a graduated scale, and means for adjustably mount said scale on one side of said bloch where y the graduations may he read through said block.

3. A fluid pressure gauge comprising a block of transparent material having a bore of uniform diameter drilled therein, one end oi said bore being in communication with a reservoir drilled in said block for containing an indicating liquid, said reservoir extending upwardiy at an angle to said here and opening to the atmosphere, the opposite end of said here being in communication with a second bore drilled in said block, said last named bore extending upwardly from said first named bore and opening to the atmos phere, and a graduated scale located on the back of 'said block and visible through the same for indicating the position of said liquid in one of said bores.

4. A fluid pressure gauge comprising a block of transparent material capable of in drilled, a substantially U-shaped passage drilled therein for containing an indicating liquid, the end portions of said passages extending to the surface of said block, an indicating liquid in said passage, a'graduated scale on said block for indicating the position of said liquid in one of said bores, and means for connecting a conduit to one end of said passage for applying suction or pressure to said liquid through said conduit and removable means for placing the opposite end of said assage in communication with the atmosp ere.

5. A fluid pressure gauge comprising a body member of transparent material, a bore extending longitudinally of said body member, bores extending upwardly from the ends of said first-named bore, said body member having recesses at each side thereof, the inner marginal walls of said recesses being ad'acent to said first-named bore, and a gra uated scale arranged in one of said recesses at an angle to the side of said body portion whereby the graduations thereon may be read from a point above the body member.

6. A fluid pressure gauge comprising a block or" material having a substantially U- shaped passage therein, the ends of said passage extending to the exterior of said block, said passage adapted to contain a pressure indicating liquid therein, means on said block for indicating the position of said liquid in said passage, said material being transparent, whereby said liquid and means are visible through said block, means whereby one end of said passage may be placed in communication with the atmosphere and means for simultaneously placing the other end of said passage in communication with a source of pressure to be measured.

7 A fluid pressure gauge comprising a block of material capable of being drilled, an inclined passa e extending longitudinally of the bloc an drilled therein, 'a reservoir drilled in said block and extending transversely thereof, said reservoir adapted to contain an indicating liquid and being in communication with one end of said passage, the opposite end of said passage adapted to be placed in communication with the atmosphere and an indicating scale on said block said block being transparent whereby said scale and passage may be observed simultaneously for indicatin the position of the indicating liquid in sai passage, 0. level device carried by said block, and means for placing said reservoir in communication with a source of pressure to be measured.

In testimony whereof I aflix mg s1 FRANK W. W

ature.

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